Pickup Selector switch wiring question

I have a Fender P-Bass Plus(p/j configuration just to clarify) And the selector was not hooked up when I got it (used). So Now i am wondering what wires go where . There are 5 blades on he switch two on top and 3 on the bottom . it is a right angle pick guard mount switch. I am thinking the + for the right and left go to the two outside bottom blades and the center one goes to the Vol Pot. But the top two do the grounds attache there and if so do they just get soldered on and run to the pots . Not really sure about any of this.

Thanks for your help.

 

The switch you are talking about is the one i have Can't get pictures small enough to load on here.